Tech Hm80 intake manifold question

[Blackshirt42]

Hey guys. I am in the process of restoring an VT-7 Super bronc and have decided to use a HM80 power plant. My SB comes with the original Jackshaft and band brake setup. As you can see in the picture, the carb, intake manifold are in the way. I was wondering how I could relocate the carb to be higher an out of the way of the Jackshaft. Thank you for your help

View attachment 57568

 

[The Restore Kid]

You'd pretty much have to come up with some other kind of intake manifold. I can't remember the pattern from the intake to engine, but think they are at a slight angle.. If the hole spacing was right, you might use an H70 intake

 

[125ccCrazy]

a custom made intake and a fuel pump if your using that gas tank...

 

[David wulf]

This is the intake i made for my super bronc .

 

[125ccCrazy]

You'd pretty much have to come up with some other kind of intake manifold. I can't remember the pattern from the intake to engine, but think they are at a slight angle.. If the hole spacing was right, you might use an H70 intake

Bridger, the bolt pattern is the same but unfortunately the way the holes are recessed in the manifold from an H engine it's backwards and puts the carb on an angle :doah:... soooo close..... great idea though.....

 

[Blackshirt42]

David, you willing to sell me a duplicate of your intake?:thumbsup: Looks nice..

 

[David wulf]

Blackshirt i made that manifold out of the same turned down type that you have now . All you have to do is cut the two flanges off and a small straight section out of the manifold and have it welded up .

 

[roccosbike]

This is the intake i made for my super bronc .

This intake looks very familiar.

 

[David wulf]

Do you have one like it ?

 

[roccosbike]

View image in gallery​

Yeah its the one on my Bonanza in my avitar.

 

[David wulf]

View image in gallery​

Yeah its the one on my Bonanza in my avitar.

Rocco i think mines bigger . LOL

 

[roccosbike]

Its whats inside that counts Dave.The HM80 on my Bonanza is mean:angry: Your welcome for the idea by the way.

 

[David wulf]

Its whats inside that counts Dave.The HM80 on my Bonanza is mean:angry: Your welcome for the idea by the way.

Thank you very much sir .:thumbsup:

 

[OPEtech]

Hey guys. I am in the process of restoring an VT-7 Super bronc and have decided to use a HM80 power plant. My SB comes with the original Jackshaft and band brake setup. As you can see in the picture, the carb, intake manifold are in the way. I was wondering how I could relocate the carb to be higher an out of the way of the Jackshaft. Thank you for your help

View attachment 57568

Order Tecumseh part number: 34349A
It's the flange that adapts the carb to the block on the HM series.
Costs about 12 dollars.

 

[David wulf]

Order Tecumseh part number: 34349A
It's the flange that adapts the carb to the block on the HM series.
Costs about 12 dollars.

I had the same flange , and its the reason i made the new manifold . With the exhaust on the right side and the fuel inlet on the inside it puts them pretty much touching . When the engine gets hot it will run like sh-t . Its hard to imagine that heald let that get by . That why my new manifold is as long as it is , gets it away from the pipe . JMHO

 

[F-85]

Just so you guys know. On my old Powell and Super Bronc with HM100 engines. I just turn the intake around. That way its up and pointing out the other way. I know i have pics somewhere.

 

[F-85]

Here are a couple.

 

[The Restore Kid]

Bridger, the bolt pattern is the same but unfortunately the way the holes are recessed in the manifold from an H engine it's backwards and puts the carb on an angle :doah:... soooo close..... great idea though.....

What if you bolted 15 of them end to end.. :laugh: